Question

1)7,2*3,5+4,1*2,3=2)4,2÷0,3-8,5:0,5=3)-5,3+4,2-2,7+1,8=

Answer 1

1.
7.2*3.5=25.2
4.1*2.3=9.43
25.2+9.43=34.63
2.
4.2:0.3=14
8.5:0.5=17
14-17=-3

3.
-5.3+4.2=-1.1
-1.1-2.7=-3.8
-3.8+1.8=2

Answer 2

To solve this expression, we use the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

7.2*3.5 is the first operation to be performed as multiplication comes before addition.

7.2*3.5 = 25.2

Next, we multiply 4.1 and 2.3:

4.1*2.3 = 9.43

Finally, we add the two results:

25.2 + 9.43 = 34.63

Therefore, 7.23.5+4.12.3 = 34.63

Again, we use PEMDAS to solve this expression.

First, we perform the division operation:

4.2 ÷ 0.3 = 14

Next, we perform the subtraction operation:

8.5 : 0.5 = 17

14 - 17 = -3

Therefore, 4.2÷0.3-8.5:0.5 = -3

For this expression, we can simply add and subtract the numbers in the order they appear:

-5.3 + 4.2 - 2.7 + 1.8 = -2.0

Therefore, -5.3+4.2-2.7+1.8 = -2.0